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Analytical Letters Volume 31, 1998 - Issue 5
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Original Articles

Simultaneous Determination of Theobromine and Caffeine in Cocoa by Partial Least-Squares Multivariate Spectrophotometric Calibration

Ö. Aksu Department of Chemistry, Yildiz Technical University, Sisli, Istanbul, Turkey
,
A. Bozdogan Department of Chemistry, Yildiz Technical University, Sisli, Istanbul, Turkey
&
G. K. Kunt Department of Chemistry, Yildiz Technical University, Sisli, Istanbul, Turkey
Pages 859-866 | Received 03 Sep 1997, Accepted 10 Dec 1997, Published online: 22 Aug 2006

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Bürge Aşçı, Özlem Aksu Dönmez, Abdürrezzak Bozdoğan & Sıdıka Sungur. (2011) SIMULTANEOUS DETERMINATION OF PARACETAMOL, PSEUDOEPHEDRINE HYDROCHLORIDE, AND DEXTROMETHORPHAN HYDROBROMIDE IN TABLETS USING MULTIVARIATE CALIBRATION METHODS COUPLED WITH HPLC-DAD. Journal of Liquid Chromatography & Related Technologies 34:16, pages 1686-1698.
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Özlem Aksu, Abdürrezzak Bozdoğan & Gönül Kunt. (2006) Simultaneous Determination of Mepyramine Maleate, Lidocaine Hydrochloride, and Dexpanthenol in Pharmaceutical Preparations by Partial Least‐Squares Multivariate Calibration. Analytical Letters 39:4, pages 751-761.
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Articles from other publishers (9)

Luzia P. Novaki, Ana M. Chinelatto, Vânia A. B. B. Silva & Omar A. El Seoud. (2021) Analysis of Consumer Products: Demonstrating the Power of LC-MS/MS for the Simultaneous Analysis of Caffeine and Other Methylxanthines in Guaraná Fruit Powder Extract. Journal of Chemical Education 98:6, pages 2083-2089.
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Özlem Aksu Dönmez, Bürge Aşçı, Abdürrezzak Bozdoğan & Sıdıka Sungur. (2011) Simultaneous determination of potassium guaiacolsulfonate, guaifenesin, diphenhydramine HCl and carbetapentane citrate in syrups by using HPLC-DAD coupled with partial least squares multivariate calibration. Talanta 83:5, pages 1601-1605.
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O. A. Donmez, A. Bozdogan, G. Kunt & Y. Div. (2010) Spectrophotometric multicomponent analysis of a mixture of chlorhexidine hydrochloride and lidocaine hydrochloride in pharmaceutical formulation using derivative spectrophotometry and partial least-squares multivariate calibration. Journal of Analytical Chemistry 65:1, pages 30-35.
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Özlem Aksu Dönmez, Mahmure Üstün Özgür & Abdürrezzak Bozdoğan. 2009. Innovations in Chemical Biology. Innovations in Chemical Biology 291 298 .
Özlem Aksu Dönmez, Abdürrezzak Bozdoğan & Gönül Kunt. (2007) Determination of Ternary Mixtures of Dextromethorphan Hydrobromide, Pseudoephedrine Hydrochloride and Triprolidine Hydrochloride in Syrups by Partial Least-Squares Multivariate Calibration. Reviews in Analytical Chemistry 26:3.
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Ali Reza Khanchi, Mohamad Khayatzadeh Mahani, Majid Hajihosseini, Mohamad Ghanadi Maragheh, Marzieh Chaloosi & Farhad Bani. (2007) Simultaneous spectrophotometric determination of caffeine and theobromine in Iranian tea by artificial neural networks and its comparison with PLS. Food Chemistry 103:3, pages 1062-1068.
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Özlem Aksu Dönmez, Abdürrezzak Bozdoğan & Gönül Kunt. (2006) Rapid and Simple Method for Simultaneous Determination of Escin and Diethylamine Salicylate in Pharmaceutical Preparations by Partial Least-Squares Multivariate Calibration. Monatshefte für Chemie - Chemical Monthly 137:9, pages 1163-1168.
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Yongnian Ni, Guowen Zhang & Serge Kokot. (2005) Simultaneous spectrophotometric determination of maltol, ethyl maltol, vanillin and ethyl vanillin in foods by multivariate calibration and artificial neural networks. Food Chemistry 89:3, pages 465-473.
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Leticia López-Martı́nez, Pedro Luis López-de-Alba, Rosalinda Garcı́a-Campos & Luis M De León-Rodrı́guez. (2003) Simultaneous determination of methylxanthines in coffees and teas by UV-Vis spectrophotometry and partial least squares. Analytica Chimica Acta 493:1, pages 83-94.
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